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An Offset-Cancelling Discrete-Time Analog Computer for Solving 1-D Wave Equation
一款基于开关电容技术的离散时间模拟计算机芯片，用于求解一维波动方程。
180nm CMOS, 560mW功耗, 41dB动态范围, 2.5MHz计算带宽
模拟计算机波动方程开关电容相关双采样Δ-Σ调制器
▸采用开关电容全差分模拟电路实现离散时间连续值有限差分求解器
▸利用相关双采样和自动归零技术降低运放偏移和低频噪声
▸内置三阶Δ-Σ调制器便于数字处理器读取模拟解
Abstract
This article describes a single-chip analog computer
for solving 1-D wave equations. The chip uses switched-capacitor
(SC)-based fully differential analog circuits to build a discrete-
time but continuous-valued finite difference solver with spatially
programmable wave velocity, selectable boundary conditions,
and arbitrary input excitation waveforms. Correlated double
sampling (CDS) and auto-zero techniques are utilized to minimize
the offset and low-frequency noise of the op-amps. Built-in
thir